This unit describes the skills required to survive at sea and the immediate measures that would need to be taken upon exposure to the water, including both surface and underwater swimming, treading water, rigging improvised and purpose flotation devices, and adopting heat-loss minimisation positions. It also covers the use of purpose survival craft and equipment, including water procurement, food procurement and emergency signalling devices.This unit was developed for Defence personnel but may be relevant to others. The context of this competency would typically be when a ship is sunk or an aircraft is downed over water. The survivor can be on their own or in a group.The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.Those undertaking this unit would act autonomously, while performing concrete tasks, in a broad range of contexts which may be highly unpredictable.No licensing, legislative or certification requirements apply to unit at the time of publication.